Electrospun 3D Structured Carbon Current Collector for Li/S Batteries
Light weight carbon nanofibers (CNF) fabricated by a simple electrospinning method and used as a 3D structured current collector for a sulfur cathode. Along with a light weight, this 3D current collector allowed us to accommodate a higher amount of sulfur composite, which led to a remarkable increas...
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| Format: | Article |
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MDPI AG
2020-04-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/10/4/745 |
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| author | Sandugash Kalybekkyzy Almagul Mentbayeva Yerkezhan Yerkinbekova Nurzhan Baikalov Memet Vezir Kahraman Zhumabay Bakenov |
| author_facet | Sandugash Kalybekkyzy Almagul Mentbayeva Yerkezhan Yerkinbekova Nurzhan Baikalov Memet Vezir Kahraman Zhumabay Bakenov |
| author_sort | Sandugash Kalybekkyzy |
| collection | DOAJ |
| description | Light weight carbon nanofibers (CNF) fabricated by a simple electrospinning method and used as a 3D structured current collector for a sulfur cathode. Along with a light weight, this 3D current collector allowed us to accommodate a higher amount of sulfur composite, which led to a remarkable increase of the electrode capacity from 200 to 500 mAh per 1 g of the electrode including the mass of the current collector. Varying the electrospinning solution concentration enabled obtaining carbonized nanofibers of uniform structure and controllable diameter from several hundred nanometers to several micrometers. The electrochemical performance of the cathode deposited on carbonized PAN nanofibers at 800 °C was investigated. An initial specific capacity of 1620 mAh g<sup>−1</sup> was achieved with a carbonized PAN nanofiber (cPAN) current collector. It exhibited stable cycling over 100 cycles maintaining a reversible capacity of 1104 mAh g<sup>−1</sup> at the 100th cycle, while the same composite on the Al foil delivered only 872 mAh g<sup>−1</sup>. At the same time, 3D structured CNFs with a highly developed surface have a very low areal density of 0.85 mg cm<sup>−2</sup> (thickness of ~25 µm), which is lower for almost ten times than the commercial Al current collector with the same thickness (7.33 mg cm<sup>−2</sup>). |
| first_indexed | 2024-03-10T20:28:56Z |
| format | Article |
| id | doaj.art-4e50cbf9f75941c2b7e46bb1c117eb4e |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T20:28:56Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-4e50cbf9f75941c2b7e46bb1c117eb4e2023-11-19T21:34:27ZengMDPI AGNanomaterials2079-49912020-04-0110474510.3390/nano10040745Electrospun 3D Structured Carbon Current Collector for Li/S BatteriesSandugash Kalybekkyzy0Almagul Mentbayeva1Yerkezhan Yerkinbekova2Nurzhan Baikalov3Memet Vezir Kahraman4Zhumabay Bakenov5National Laboratory Astana, Nazarbayev University, Institute of Batteries, Nur-Sultan 010000, KazakhstanNational Laboratory Astana, Nazarbayev University, Institute of Batteries, Nur-Sultan 010000, KazakhstanNational Laboratory Astana, Nazarbayev University, Institute of Batteries, Nur-Sultan 010000, KazakhstanSchool of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, KazakhstanDepartment of Chemistry, Marmara University, Istanbul 34722, TurkeyNational Laboratory Astana, Nazarbayev University, Institute of Batteries, Nur-Sultan 010000, KazakhstanLight weight carbon nanofibers (CNF) fabricated by a simple electrospinning method and used as a 3D structured current collector for a sulfur cathode. Along with a light weight, this 3D current collector allowed us to accommodate a higher amount of sulfur composite, which led to a remarkable increase of the electrode capacity from 200 to 500 mAh per 1 g of the electrode including the mass of the current collector. Varying the electrospinning solution concentration enabled obtaining carbonized nanofibers of uniform structure and controllable diameter from several hundred nanometers to several micrometers. The electrochemical performance of the cathode deposited on carbonized PAN nanofibers at 800 °C was investigated. An initial specific capacity of 1620 mAh g<sup>−1</sup> was achieved with a carbonized PAN nanofiber (cPAN) current collector. It exhibited stable cycling over 100 cycles maintaining a reversible capacity of 1104 mAh g<sup>−1</sup> at the 100th cycle, while the same composite on the Al foil delivered only 872 mAh g<sup>−1</sup>. At the same time, 3D structured CNFs with a highly developed surface have a very low areal density of 0.85 mg cm<sup>−2</sup> (thickness of ~25 µm), which is lower for almost ten times than the commercial Al current collector with the same thickness (7.33 mg cm<sup>−2</sup>).https://www.mdpi.com/2079-4991/10/4/745carbon nanofiberslithium-sulfur batteryelectrospinning methodelectrode capacitycurrent collector |
| spellingShingle | Sandugash Kalybekkyzy Almagul Mentbayeva Yerkezhan Yerkinbekova Nurzhan Baikalov Memet Vezir Kahraman Zhumabay Bakenov Electrospun 3D Structured Carbon Current Collector for Li/S Batteries Nanomaterials carbon nanofibers lithium-sulfur battery electrospinning method electrode capacity current collector |
| title | Electrospun 3D Structured Carbon Current Collector for Li/S Batteries |
| title_full | Electrospun 3D Structured Carbon Current Collector for Li/S Batteries |
| title_fullStr | Electrospun 3D Structured Carbon Current Collector for Li/S Batteries |
| title_full_unstemmed | Electrospun 3D Structured Carbon Current Collector for Li/S Batteries |
| title_short | Electrospun 3D Structured Carbon Current Collector for Li/S Batteries |
| title_sort | electrospun 3d structured carbon current collector for li s batteries |
| topic | carbon nanofibers lithium-sulfur battery electrospinning method electrode capacity current collector |
| url | https://www.mdpi.com/2079-4991/10/4/745 |
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